Method for controlling and/or regulating an automated transmission

Abstract

A method of controlling and / or regulating an automated transmission of a vehicle in which a rolling function or a coasting function of the vehicle is activated in an automatic mode, under predetermined conditions, such that the drivetrain is disengaged and the drive motor is one of operated at idle or is switched off at times. The rolling function or the coasting function is automatically terminated if at least one of the predetermined conditions is no longer present. The rolling function or the coasting function can also be terminated manually by the driver, and a manually operable shifting strategy can be initiated.

Description

[0001]This application is a National Stage completion of PCT / EP2010 / 062677 filed Aug. 31, 2010, which claims priority from German patent application serial no. 10 2009 045 091.2 filed Sep. 29, 2009.FIELD OF THE INVENTION[0002]The present invention concerns a method for controlling and / or regulating an automated transmission.BACKGROUND OF THE INVENTION[0003]Automated transmissions are known from automotive technology. Such transmissions can be operated inter alia in an automatic mode, in which the operation of the transmission is governed by the transmission control system. It is also known that a so-termed manual mode is available in which, the driver can manually select a higher or a lower gear by actuating a tip key.[0004]During the automatic mode, under certain conditions a so-termed rolling function or coasting function can be activated by the transmission control system in order to thereby save fuel. When the rolling function is activated the drive-train is opened and the drive...

AI Technical Summary

Benefits of technology

[0011]In this way, not only in the manual mode as already known, but also in the automatic mode or an automatic shifting program, the driver can deliberately influence the manner in which the transmission is operated and thus specify to the transmission control system a particular shifting strategy.

[0014]Another possible way for deliberately influencing the operating mode of the transmission can provide that by actuating the tip-minus key, the active rolling function or coasting function is terminated immediately and, as an alternative, a gear is selected and engaged which produces a maximum motor braking effect. Thus, the transmission control system can be influenced by the driver in such manner that after abandoning the rolling or coasting function a gear is selected, which brings the engine speed into a definably applicable high-speed range so that the desired motor braking action, which also increases with increasing motor speed, is produced.

Problems solved by technology

The known methods have the disadvantage that the coasting function can only be activated or deactivated automatically, so the attempt is made to produce the prerequisites for activating or deactivating the coasting function.

Furthermore, in the automatic mode, when the coasting function or the rolling function has ended, the driver has no way to influence the subsequent shifting strategy of the transmission control system.

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